about this project USB Rechargeable: Buying an LED flashlight will provide you with a matching USB cable, which is as convenient as using a mobile phone, and you don't need to look for batteries. There are four blue lights above the switch, indicating sufficient power. When the battery is low, the 4 blue lights will gradually turn off, indicating that it needs to be charged. When it's fully charged, all 4 lights will light up. DURABLE LIFE: The portable LED torch offers extreme brightness and offers up to 30 hours of continuous runtime (low light mode) or 6 hours (powerful high light mode). Tube cooling system prevents it from overheating during use. A total of more than 50,000 hours of long-term use. Twice as powerful as a normal flashlight. 5 Modes & Zoomable: It has 5 light modes (High/Medium/Low/Strobe/SOS). Meet various needs. Switch modes with just one click. Long press the switch to turn off the flashlight. Swivel this flashlight in or out to create a spotlight or floodlight. When you zoom in you will see the beautiful pattern! WATERPROOF: The LED flashlight is waterproof and can work well even in bad weather, keeping you safe and sound. The lanyard and full-body scrub design are non-slip and crack-resistant. Sturdy aluminum alloy prevents scratches or twisting while you use it.